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Collection and Long-Term Maintenance of Leaf-Cutting Ants Atta in Laboratory Conditions
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Are tiny subterranean ants top predators affecting aboveground ant communities?

Leo Ohyama1, Joshua R King1, David G Jenkins1

  • 1Department of Biology, University of Central Florida, 4110 Libra Drive, Orlando, Florida, 32816, USA.

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Summary

Thief ants, small subterranean predators, significantly impact ant communities by preying on young. Reducing thief ants led to increased abundance and biomass of other ant species, revealing their crucial role in regulating ant populations.

Keywords:
Solenopsisadaptive traitsbrood raidingfield experimentpopulationpreyspecialized predatorthief ants

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Area of Science:

  • Ecology
  • Entomology
  • Behavioral Ecology

Background:

  • Ants are ecologically vital, with predators influencing prey abundance.
  • Thief ants (Solenopsis Westwood) are small, subterranean predators specializing in consuming immature ants of larger species.
  • Long-term predation effects by ants are poorly understood due to limited experimental studies.

Purpose of the Study:

  • To experimentally assess the long-term impact of thief ant predation on ant community structure.
  • To quantify predator-release effects in natural ant communities by manipulating thief ant populations.

Main Methods:

  • A ~1.5-year field experiment was conducted, reducing thief ant populations in designated plots.
  • The co-occurring ant community was sampled to measure changes in abundance and biomass.
  • Control plots were maintained for comparison.

Main Results:

  • Reducing thief ants resulted in increased overall worker ant abundance and biomass compared to control plots.
  • Specific aboveground foraging ant species significantly increased in abundance, indicating a predator-release effect.
  • The impact of thief ant reduction varied among different ant species within the community.

Conclusions:

  • Thief ants act as significant predators, regulating the populations of other ant species.
  • Their widespread nature suggests thief ants play a crucial role in many ant communities globally.
  • Understanding thief ant predation is essential for comprehending top-down regulation and ecosystem processes in ant communities.